JPS6366283A - Foundation improving material comprising dust of electric furnace as raw material - Google Patents
Foundation improving material comprising dust of electric furnace as raw materialInfo
- Publication number
- JPS6366283A JPS6366283A JP21114086A JP21114086A JPS6366283A JP S6366283 A JPS6366283 A JP S6366283A JP 21114086 A JP21114086 A JP 21114086A JP 21114086 A JP21114086 A JP 21114086A JP S6366283 A JPS6366283 A JP S6366283A
- Authority
- JP
- Japan
- Prior art keywords
- dust
- electric furnace
- hydraulic cement
- industrial waste
- foundation improving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 23
- 239000000428 dust Substances 0.000 title claims abstract description 22
- 239000002994 raw material Substances 0.000 title claims description 4
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 12
- 239000011396 hydraulic cement Substances 0.000 claims abstract description 9
- 239000002893 slag Substances 0.000 claims abstract description 7
- 150000003568 thioethers Chemical class 0.000 claims abstract description 6
- 239000002699 waste material Substances 0.000 claims abstract description 5
- 229910001653 ettringite Inorganic materials 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 4
- 238000010828 elution Methods 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 239000002440 industrial waste Substances 0.000 abstract description 8
- 239000000203 mixture Substances 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 150000002739 metals Chemical class 0.000 abstract description 2
- 239000004566 building material Substances 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 6
- 239000004568 cement Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000011041 water permeability test Methods 0.000 description 3
- -1 In particular Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 231100001261 hazardous Toxicity 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000699670 Mus sp. Species 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920005556 chlorobutyl Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000003923 scrap metal Substances 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Description
【発明の詳細な説明】
屑鉄を電気炉で熔融して鉄鋼をｉｆｆ ノ、１する際
へ温のため気化した金属の酸化物番、Ｉ煙霧状の敬事）
ｒとなって築塵機で補集される。（以１’この補集物を
ダストと略称する）
原料の屑鉄はその性格」二、メツ１−や塗ｙ、 ｔ、
ｔ：物などが混在するため、これらに含−トねる自害重
金属がダスト中に移行し、所謂処理困難ム産茅廃東物と
されてきた。[Detailed description of the invention] When scrap metal is melted in an electric furnace to make steel
Oxide of metal vaporized due to temperature, I smoke-like honor)
r and is collected by a dust collector. (Hereinafter, this collection will be referred to as dust.) The characteristics of the raw material scrap iron are 2.
t: Because the dust is mixed with other materials, the self-harming heavy metals contained in these materials migrate into the dust, and it has been considered as so-called waste that is difficult to dispose of.
本発明は、有害産業廃棄物であるジス１中の自害物質、
特に鉛、カドミウムなどを１記の方法によって重金属イ
オンの溶出を無くし、無害化したものを原料とし、これ
にエトリンジヤイト （３ＣａＯ・ＡＩ＋０＋・３Ｃａ
ＳＯｉ・３２ ＩＩＪ）生成を目的とした水硬性セメン
ト（以下水硬性セメント略称する）を添加固化せしめる
ことによって、独特な性状を持つ地盤改良材の製造を可
能としたものである。The present invention deals with self-harming substances contained in Jis-1, which is a hazardous industrial waste,
In particular, lead, cadmium, etc. are used as raw materials by eliminating the elution of heavy metal ions and making them harmless by the method described in 1 above, and this is combined with ettringite (3CaO・AI+0+・3Ca
By adding and solidifying hydraulic cement (hereinafter referred to as hydraulic cement) for the purpose of producing SOi・32 IIJ), it has become possible to manufacture a ground improvement material with unique properties.
即も、我国で月間数十万トン排出されるダストを産業廃
復物として処理、処分するのではなく、地盤改良材とし
て有効利用することが可能となった。又ダスト排出事業
所に於いて、同時に排出されることの多い産業廃棄物、
即ち高炉滓、転炉滓などのｔＪＬｌ宰頬や建設廃材など
の粗砕物を粗骨材として添加ずろことによって、増量生
産が可能であるのみならず、地盤改良材としての重要特
性であるＩ＋縮強度、ＣＢＲ値などの大幅な向上が得ら
れた事は、再生利用に際する製品性能の向上と、経済側
に寄りずろことが極めて大きい。Immediately, it became possible to effectively use the dust, which is produced in Japan in the hundreds of thousands of tons per month, as a ground improvement material, rather than treating and disposing of it as industrial waste. In addition, industrial waste, which is often discharged at dust-emitting establishments,
In other words, by adding coarse aggregates such as blast furnace slag and converter slag, as well as coarsely crushed materials such as construction waste, it is not only possible to increase production, but also to improve I+ shrinkage, which is an important property as a soil improvement material. The significant improvement in strength, CBR value, etc. is due to the improvement in product performance during recycling and to the economic side.
第−表に、ダスト中の各成分の含有量及び、重金属など
の溶出量の一例を記１゜
第−表
ダストを無害化処理ゼす、そのまま水硬性セメントを添
加し水と混練りしたものも、本発明の地盤改良材として
の略々近仰の性能を有するものが得らね、又有害な産業
廃棄物に係る判定基準（総理府令）に製造直後には水和
セメン１の強アルカリのため合格することがあるが、長
期間後には空気中の酸性ガス （ＣＯｙ、 ＮＯｘ、
ＳＯｘなど）によって固化物のｐ Ｈ値が次第に低下し
、水酸化物となった有害重金属から金属イオンが再溶出
することが分かっている。このため環境汚染防止の見地
から本発明に於いては、ダスト中の有害重金属を酸性に
於いても安定な硫化物とすることが必須である。Table 1 shows an example of the content of each component in the dust and the elution amount of heavy metals, etc. 1゜Table 1 Dust is detoxified and mixed with water after adding hydraulic cement as it is. However, it has not been possible to obtain a material that has almost the same performance as the soil improvement material of the present invention, and the criteria for hazardous industrial waste (Prime Minister's Office Ordinance) indicate that hydrated cement 1 must be a strong alkaline material immediately after production. However, after a long period of time, acid gases (COy, NOx,
It is known that the pH value of the solidified material gradually decreases due to SOx (SOx, etc.), and metal ions are re-eluted from the toxic heavy metals that have become hydroxides. Therefore, in the present invention, from the viewpoint of preventing environmental pollution, it is essential to convert the harmful heavy metals in the dust into sulfides that are stable even in acidic conditions.
因に１−壌は、上記酸性ガスのため最終的にｐ）Ｈ値が
５．５近くになると云われ、又近頃問題とさねている
酸性雨は我国に於いてもｐＨ値が３〜４になる場合も多
く（１）、かかるｐ Ｈ値に於いては、未処理ダスト中
の有害金属酸化物の溶解に基ずく重金属イオンの溶出が
みられる。このため本発明に於いてはダス１を水中に分
散、懸濁せしめたものに硫酔イオンをｉＷ＃する硫化処
理用各種薬品を添加して酸化重金属類を硫化物とする前
処理を行−３＝
う。処理後のゲス１粒子は未処理ダストと略々同じ粒子
ＪＩ！（０，０１〜０．１μの間）の極め゛Ｃ微細な粒
子から成っており、又真比重が５ ｉｉｉ＋ １Ｊｔと
いろという特殊な性状をもつものである。Incidentally, it is said that the p)H value of 1-soil will eventually reach close to 5.5 due to the above-mentioned acidic gases, and acid rain, which has been a problem recently, has a pH value of 3 to 3 in Japan. In many cases, the pH value is 4 (1), and at such a pH value, elution of heavy metal ions due to the dissolution of harmful metal oxides in the untreated dust is observed. For this reason, in the present invention, various chemicals for sulfidation treatment that convert sulfur ions into iW# are added to Das 1 dispersed and suspended in water to perform pretreatment to convert oxidized heavy metals into sulfides. 3 = Uh. One particle of Gess after treatment is almost the same particle JI as untreated dust! It is made up of extremely fine particles (between 0.01 and 0.1μ), and has a special property of having a true specific gravity of 5III+1 Jt.
処理を行ったダストは泥状であるが、こｊ′＋に水硬性
セメントを添加することによって数時間後に凝結を開始
する。この際、処理ジス１粒子１．１永和セメント粒子
に対する微細骨材の負角を７するものと考えられ、水硬
性セメントに出来する：ｔ ｌ・リンジャイトの針状結
晶の絡み合いとゲル形成と相まって独特な性状の固化体
が得られる。The treated dust is in the form of mud, but by adding hydraulic cement to the dust, it begins to solidify after a few hours. At this time, it is thought that the negative angle of fine aggregate to 1.1 Eiwa cement particles is 7, resulting in hydraulic cement. A solidified product with unique properties is obtained.
本発明による地盤改良材の特徴としては、次のごときも
のがあげられる。１．処理ダスト粒子が極めて微細であ
るため、一般土壌と異なり透水ｆ！［が殆ど無い。２．
固化物の圧縮変形が少ないため地盤沈下が少ない。３．
各種鉱暑゛顛、建設廃材の粗砕物などと混合して、圧縮
強度・ＣＩＩＲ値を大きくすることが出来る。以下・例
をあげて、その製造法及び地盤改良材としての特徴を説
明゛」る。Features of the ground improvement material according to the present invention include the following. 1. Because the treated dust particles are extremely fine, unlike general soil, water permeability f! [There is almost no. 2.
Because there is little compressive deformation of the solidified material, there is little ground subsidence. 3.
Compressive strength and CIIR value can be increased by mixing with various mineral hot materials and coarsely crushed construction waste materials. The manufacturing method and characteristics of the material as a soil improvement material are explained below with examples.
（実施例）ＩＯｍ’容量の回転胴式傾斜混合機に水１蛙
を入れておき、これにダスト５而を投入し４一
回転混合して均一な泥状物とする。これに多硫化ソーダ
溶液（ＮａＯ７，８χ、Ｓ ２２．３χ）２５０紙を添
加３０分間混合を行い、ダスト中の有害重金属（Ｐ ｈ
、 Ｃｄその他）を難溶性の硫化物として無害化処理
を行った泥状物とする。(Example) One piece of water is placed in a rotary barrel type tilting mixer having a capacity of IOm', and five pieces of dust are added thereto, and the mixture is mixed 4 times to form a homogeneous slurry. To this, 250 papers of polysulfide soda solution (NaO7,8χ, S22.3χ) were added and mixed for 30 minutes to remove harmful heavy metals (P h ) in the dust.
, Cd, etc.) are treated to render them harmless as poorly soluble sulfides.
この処理物１辰に対して、次の組成物を作った。The following composition was prepared for one portion of this treated product.
（イ）］ＯＯＭの水硬性セ／ ７ ト（ＳｉＯ＋ １６
．２χ。(a)] OOM hydraulic set/7 (SiO+ 16
．． 2χ.
ＡＩ、０＋ ７．８Ｘ、ＣａＯ４９，２！ 、
ＭｇＯ２，３！ 、 Ｓｏｔ ２０．４Ｘ）を添
加１０分間撹拌混合したもの。AI, 0+ 7.8X, CaO49,2! ,
MgO2,3! , Sot 20.4X) and stirred and mixed for 10 minutes.
（ロ）粉砕高炉７． ラグ（５ｉｆｔ ３３．６χ、
Ａｌ２Ｏ！ ？、８χＣａＯ４１，ｆｄ 、その他）１
２（ｌと、排煙脱硫石膏（Ｓｏｔ ２５．Ｒχ、 Ｃａ
Ｏ２６，３χ、その他）ＩＩＯＭとの混合物を添加した
もの。(b) Grinding blast furnace 7. Lag (5ift 33.6χ,
Al2O! ? , 8χCaO41, fd, etc.) 1
2 (l and flue gas desulfurization gypsum (Sot 25.Rχ, Ca
O26, 3χ, etc.) to which a mixture with IIOM is added.
（ハ）転炉滓粗砕物（１００ｍｍの網ふるいを通過した
もの）の空隙を処理泥状物で略々充填した割合で２．９
４鼠を（イ）に添加混合したもの。(c) The ratio at which the voids in the crushed converter slag (passed through a 100 mm mesh sieve) are approximately filled with treated slurry is 2.9
A mixture of 4 mice added to (a).
第二表
（イ）について
透水試験結果（ＪＩＳ Ａ １２１８の透水試験方法に
準ず）浮潤密度（ｇ／ｃＩｌ） ２．５６３透水係
数（ｃｍ／秒） ４．０６ Ｘ １０−’−
軸圧縮強度（ＪＩＳ Ａ １２１６の透水試験方法に準
ず）材令 −軸圧縮強度（ｋｇ ／ ｃｌ ） １．
１縮変形（％）３日 ２．１０
７日 ３．２３ ０．８第二表
（イ）、（ハ）について
ＣＢＲ試験（供試体を２０℃の恒温槽に３日間密閉養生
し、４日間２０℃養生槽に浸漬、ＪＩＳ Ａ １２１１
に準じる）
ＣＢＲ（％）−軸圧縮強度（ｋｇ ／ ｃｌ ） （材
令７［１）（イ） ５．８
３．２３（＋１） ２５３，１
１２．２第四表
（ロ）、（ハ）の圧縮強度
１日 ７日 ２８［１
（ロ） ２．５ ８．７ １５．
７（ハ） ４．６ １２．２ ２３
．８以上の如く、電気炉ダスト中の有害金属を姉溶性の
安定な硫化物としたものをに成分とし、こねに水硬性を
もたせるためエトリンノ→・イＩ・／１成を目的とした
水硬性セメントを添加−ロるものは１１！Ｉ盤改良材と
して適切な性状を持つことが分かる。水硬性セメントと
は、市販の土壌セメントでもよく活性アルミナとカルシ
ウム及び硫酸根を含有する粉末状の産業廃棄物の混合体
でもよい。又、ダスト発生地点で発生ずることの多い各
種鉱滓や建設廃材の相砕物を混用することにより、圧縮
強度やＣＢＲ値を向上させることが可能で、優れた性能
の−に壌改良剤が得らねる。Water permeability test results for Table 2 (A) (according to the water permeability test method of JIS A 1218) Buoyant density (g/cIl) 2.563 Water permeability coefficient (cm/sec) 4.06 X 10-'-
Axial compressive strength (according to JIS A 1216 water permeability test method) Material age - Axial compressive strength (kg/cl) 1.
1 Shrinkage deformation (%) 3 days 2.10 7 days 3.23 0.8 CBR test for Table 2 (a) and (c) (the specimen was sealed in a constant temperature bath at 20°C for 3 days, and then cured for 4 days) Immersed in a 20℃ curing tank, JIS A 1211
) CBR (%) - Axial compressive strength (kg/cl) (Material age 7 [1) (A) 5.8
3.23 (+1) 253,1
12.2 Compressive strength in Table 4 (B) and (C) 1 day 7 days 28 [1 (B) 2.5 8.7 15.
7 (c) 4.6 12.2 23
．． As shown in 8 above, the toxic metals in the electric furnace dust are converted into soluble stable sulfides as an ingredient, and in order to give the dough hydraulic properties, the hydraulic properties are aimed at forming Etrinno→・I・/1. Add cement - 11! It can be seen that it has properties suitable as an I-board improvement material. The hydraulic cement may be a commercially available soil cement or a mixture of powdered industrial waste containing activated alumina, calcium, and sulfate radicals. In addition, by mixing various types of mining slag and construction debris that are often generated at dust generating points, it is possible to improve the compressive strength and CBR value, making it possible to obtain a soil conditioner with excellent performance. Sleep.
本発明は多量に発生する処理困難な産業廃棄物を優れた
地盤改良剤として有効利用出来る事に特長をもつもので
ある。The present invention is characterized in that industrial waste, which is generated in large quantities and is difficult to dispose of, can be effectively utilized as an excellent ground improvement agent.
引用文献（１）：水道協会雑誌昭和６１年５月（第６２
０号）Ｐ、２〜１３Cited document (1): Water Works Association Magazine May 1986 (62nd
No. 0) P, 2-13
Claims (1)
硫化物として、重金属イオンの溶出を防止したものを原
料とし、これにエトリンジャイト生成を目的とした水硬
性セメントを添加し、要すれば凝結開始前に各種鉱滓、
建設廃材などを粗骨材として添加して得られる地盤改良
材。Harmful heavy metals contained in electric furnace dust are converted into sulfides that are poorly soluble in water to prevent the elution of heavy metal ions, and this is used as a raw material.Hydraulic cement for the purpose of producing ettringite is added to this, and if necessary, Before the start of coagulation, various slags,
A ground improvement material obtained by adding construction waste as coarse aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21114086A JPS6366283A (en) | 1986-09-08 | 1986-09-08 | Foundation improving material comprising dust of electric furnace as raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21114086A JPS6366283A (en) | 1986-09-08 | 1986-09-08 | Foundation improving material comprising dust of electric furnace as raw material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6366283A true JPS6366283A (en) | 1988-03-24 |
Family
ID=16601041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21114086A Pending JPS6366283A (en) | 1986-09-08 | 1986-09-08 | Foundation improving material comprising dust of electric furnace as raw material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6366283A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006051875A1 (en) * | 2004-11-11 | 2006-05-18 | Denki Kagaku Kogyo Kabushiki Kaisha | Composition for ground-improving material, grouting material comprising the same, and method of using the same |
| TWI644721B (en) * | 2016-09-06 | 2018-12-21 | 大林組股份有限公司 | Water stop liquid mixing injection system, water stop liquid mixing injection plug, and water stop method for cement composition structure |
-
1986
- 1986-09-08 JP JP21114086A patent/JPS6366283A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006051875A1 (en) * | 2004-11-11 | 2006-05-18 | Denki Kagaku Kogyo Kabushiki Kaisha | Composition for ground-improving material, grouting material comprising the same, and method of using the same |
| JPWO2006051875A1 (en) * | 2004-11-11 | 2008-05-29 | 電気化学工業株式会社 | Composition for ground improvement material, injection material using the same, and method of using the same |
| TWI644721B (en) * | 2016-09-06 | 2018-12-21 | 大林組股份有限公司 | Water stop liquid mixing injection system, water stop liquid mixing injection plug, and water stop method for cement composition structure |
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